This puzzle is related to the very popular 10 Penny puzzle, but it is more difficult.

Based on circle packing mathematics where the area of each piece increases by an area equal to the #1 circle. Although we did slightly modify the #1,4, and 10 pieces to take up any rattle room. We believe there is only one solution which is provided with the puzzle.

Size of puzzle is 4 x 4.4 x .5" Pieces are laser cut and etched for accuracy. Base is floorboard for stability and scratch resistance. Pieces are alder and maple, though these woods may vary.

Level of Difficulty: 2